CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) shares in Thousands, $ in Thousands		9 Months Ended
		Mar. 31, 2018		Mar. 31, 2017
Operating activities:
Net (loss) income		$ (281,395)	[1]	$ 9,409
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization		24,608	[1]	15,301
Amortization of debt issuance costs and debt discount		4,603	[1]	4,355
Amortization of deferred financing costs		833	[1]	300
Provision for doubtful accounts		305	[1]	(18)
Non-cash stock compensation		6,442	[1]	5,239
Deferred income taxes		11,714	[1]	627
Environmental charge		902	[1]	903
Earnings on equity investment in joint venture		(1,990)	[1]	(1,558)
Contingent consideration	[1]	(2,505)
Impairment charges	[1]	256,266
Changes in assets and liabilities:
Trade accounts receivable		2,573	[1]	(14,839)
Other receivables		(3,662)	[1]	1,664
Inventory		(3,102)	[1]	(3,778)
Prepaid expenses and other current assets		(927)	[1]	(424)
Other assets		(2,202)	[1]	215
Accounts payable		34,224	[1]	18,857
Accrued expenses and other liabilities		9,728	[1]	(4,702)
Net cash provided by operating activities		56,415	[1]	31,551
Investing activities:
Payment for net assets of business acquired				(270,000)
Purchases of investments		(2,880)	[1]	(1,824)
Sales of investments		1,867	[1]	775
Payments for intangible assets		(779)	[1]	(3,077)
Purchases of property and equipment, net		(4,677)	[1]	(1,386)
Net cash used in investing activities		(6,469)	[1]	(275,512)
Financing activities:
Payment of cash dividends		(5,924)	[1]	(5,944)
Proceeds from exercise of stock options		595	[1]	550
Excess tax benefit on stock option exercises and restricted stock				551
Borrowings of bank loans				265,000
Payment for deferred financing costs				(5,407)
Repayment of bank loans		(39,398)	[1]	(16,898)
Net cash (used in) provided by financing activities		(44,727)	[1]	237,852
Effect of exchange rate changes on cash		1,133	[1]	(757)
Net increase (decrease) in cash		6,352	[1]	(6,866)
Cash and cash equivalents at beginning of period		55,680		66,828
Cash and cash equivalents at end of period		$ 62,032	[1]	$ 59,962
Noncash Investing and Financing Items [Abstract]
Number of shares to be issued	[1]	5,122
Fair value of future issuance of shares		$ 90,400

[1] (as restated)